Rubber tread for boots and shoes.



GEORG-E IM. AMEBSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

RUBBER TREAD FOR BOOTS AND SHOES.

Specification of Letters Patent.

Patented Oct. I5, 1918.

Application led July 25, 1917. Serial No. 182,683.

To all whom t may concern.'

Be it known that. I, GEORGE M.ANDERsoN, a citizen of the United States,resident of lVashington, in the District of Columbia, have made acertain new and useful Invention in jRubber'Treads for Boots and Shoes;and I declare the following'v to be a full, clear, 'and eXactdescription -of the same, such as will enable others skilled in the artto which it appertains to make and use the invention, reference beinghad Vto the accompanying drawings, and to letters or figures ofreference marked thereon, which form a part of this specication.

Figure 1 is a central vertical cross section ofthe invention,

Fig` 2 shows in detail perspective view the plug, the metal bach'ng andthe rubber member.

IFig. ffly is a central vertical section of a modification.

Fig. 4 is a detail perspective view of the modif-led metal backing.

The invention has relation to rubber heels wherein are used hollowfriction plugs, wound from a strip of rubber-coated or frictionizedcanvas, said plugs vulcanized to the body of the heel, the object of theinvention being to dispense with either interior or exterior metallic orpost retaining means for the hollow plugs, and to provide insubstitution therefor improved retaining means for the plug.

The invention consists in the novel lconstruction and combinations ofparts, as hereinafter set forth.

In the accompanying drawings, illustrating the invention, the numeral 2designates a rubber heel, 3 a backing, usually of circular form and oferforated metal, and 4 the plug, engaged wlthin a recess of the heel,wound from a strip of frictionized canvas or other suitablerubber-coated material and provided with a central perforation 5.

The fastening nail 3 has its head engaged within the perforation of thehollow plug and its shank engaged with the central portion of thebacking. 7The perforation of the backing is of smaller size than that ofthe hollow plug, and is provided with a marginal portion overlying thetop of the perfora- .through the backing.

In` the manufacture of the heel, the rubber material of the member 6will vulcanize perfectly with the rubber constituent of the plug, andwill also closely adhere to the lower4 face of the backing and even flowwithin the perforation of the backing and around the peripheral edgethereof, so that y the plug wil be as securely held in the heel as isthe backing itself by the fastening nail.

A. modification of `the invention is shown in Figs. 3 and 4 of 'thedrawings, wherein the ymetal backing 32 is shown as also havingperforation 7, located between the central perforation 7 thereof and theedge of the backing, the object being to. allow the rubber of the member6 to ow also within these additional perforations, for better lockingeffect.

I claim:

l. In a rubber tread for boots and shoes, having a recess, a hollowfriction plug of rubber-containing material located within said recess,backing means overlying said plug, a rubber member locatedintermediately of said plug and said backing means and vulcanized tosaid plug and incorporated with said backing means, and a fastening nailthe head of which engages the hollow of said plug and the bottom of saidbacking means and the shank of which asses through the central portionof said acking means.

2. In a rubber tread for boots and shoes having a recess opening intoits tread face, a friction plug of rubber containing material located insaid recess, and a rubber bonding memberllocated between a wall of saidrecess and said plug, and incorporated with both the plug and thematerial of the heel.

3. In a rubber tread for boots and shoes having a recess opening intoits tread face, a friction plug of rubber containing material located insaid recess, and a rubber bonding In testimony whereof I -ax mysignature member overlying the plug and located bein presence of twoWitnesses.

tween the same and the top Wall of said re- GEORGE M. ANDERSON. cess,said member vulcanized and in- Witnesses: 5 corporated with both thematerial of the W. R. BAUM,

plug and the material of the' heel. STUART HILDER.

